Re: nokia 7110

On Donnerstag, Februar 13, 2003, at 11:52  Uhr, Nicholas Rahn wrote:

> Hi list,
>
> we are having a problem with our nokia 7110 phones using kannel's at2
> smsc module.  it's not clear to me if our problem is with the phone, 
> the
> sim card or with kannel, so i thought i might see if anyone on the list
> has any ideas.
>
> our setup:
> 3 7110s connected via data cables (RS 232) to the serial ports of a
> linux box.  we use kannel and the at2 smsc module connected to the
> phones to send/receive SMS periodically throughout the day, somewhere
> around 30 msg/day/phone. each phone is connected to a different mobile
> operator (3 different sim cards) (operators: "A","B","C"). this setup 
> is
> basically an automatic SMS service testing application.
>
> the problem:
> after a variable amount of time (2 days to 10 days), the phone 
> connected
> to one particular operator ("A") refuses to receive messages.  it is
> perfectly able to send, but nothing is received (no indication in the
> kannel logs that anything has reached the phone).  we turn off the 
> tests
> for the first phone and let the other 2 continue to run.  after another
> variable amount of time (several days), the phone connected to the
> second operator ("B") refuses to receive messages.  at this point i
> become very frustrated. :-) i turn off the phones (removing the
> batteries), wait a few minutes, turn on the phones and restart the
> application.  things work fine again for another variable amount of 
> time
> (several days) before the entire process starts again.

The problem is your 7110. The reason is that those phones where never 
made for heavy duty use and its easy to confuse the phone. Its enough 
to send and receive in the same second or send too fast or such. This 
is a general problem of using AT driver on Nokia phones. If you use 
heavy duty GSM modems you wont have this effect.

Andreas Fink
Global Networks Switzerland AG

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